Temperature-regulator.



No. 705,6!3. Patented July 29 I902. A. ROESCH.

TEMPERATURE REGULATOR.

(Application filed May. 14, 1900.)

2 SheRts-Sheet I.

(Ilo Model.)

Inventor.

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No. 705,6l3. Patented July29, I902.

A. ROESCH.

TEMPERATURE REGULATOR.

(Applieatiqn filed Mar. 14, 1900.)

, (No Model.) 2 Sheets-Sheet 2.

WITNESSES: l INVENTOR UNITED STATES PATENT OFFICE.

ALFRED ROESCI-I, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO DAVIS & ROESCH TEMPERATURE CONTROLLING COMPANY, OF NEXV YORK, N. Y.,

A CORPORATION OF NEW JERSEY.

TEM PERATU RE-REG U LATO R.

SPECIFICATION forming part of Letters Patent No. 705,613, dated July 29, 1902. Application filed March 14,1900. Serial No. 8,590. (No model.) I

To all whom it may concern: 1

Be it known that I, ALFRED ROESOH, a citizen of the United States of America, and a resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Temperature-Regulators, of which the following is a specification, reference being had to the ac companyin g drawings,forming a part thereof.

My invention relates to that class of temperature-regulators in which the actuating means of the heat-controller is controlled, primarily, by a thermostatic device and, secondarily, by pneumatic pressure.

In carrying out my invention a thermostatic device is first employed to controlthe movements of a small pneumatic valve of butv slight resistance, such valve when opened permitting the escape therethrough of compressed air or other motive fluid to open another pneumatic valve which will permit compressed air to pass therethrough to a steamvalve or similar device controlling a heat-supply. The secondary valve may be arranged 2 5 to permit the passage therethrough of a larger quantity of motive fluid during a given time than will the primary valve, and a quicker and more positive action of the heat-controller may be thereby attained. I have illustratedanddescribed in connection with my invention herein a novel form of thermostatic device, but have made no claim to such thermostatic device in this application, as the same forms the subject-mat- 3 5 ter of a copending application the s'erialnumber of which is 43,188 and. the date of filing January lei, 1901.

My invention also consists in improvements in the valves and valve mechanism employed and in certain improvements in construction and combination of parts, as will hereinafter more fully appear.

In the drawings which form a part of this specification, Figure l is a front or face View of a temperature-regulatorembodying my invention. Fig. 2 is a view in longitudinal section, the plane of section being taken upon the line 2 2 of Fig. 1. Fig. 3 is a view in transverse section, the plane of section being taken upon the line 3 3 of Fig. 1. Fig. 4 is the arm 22.

a detail view showing an enlarged section of one of the air-controlling valves and its contiguous parts. Fig. 5is a similar detail view, the line of section being taken through the other of the air-controllin g valves and its con tiguous parts.

Referring in detail to the drawings, reference oharacterl designates a suitable baseplate,which is formed of some material, preferably cast-iron, which is but slightly affected by changes of temperature. Supported atone end upon the base-plate 1as, for instance,

upon an uprising lug 20-is a thermostatic member 2, here shown as a single thin metallic plate. This plate may be of brass or of other metal or metallic compound, which is of greater expansiblity under the influence of a rise in temperature than the supportingbase. The opposite end of said metallic strip 2 is secured to a stud 21, depending from a lever, hereinafter referred to as the primary lever and which lever as a whole is designated by the reference character 16. The primary lever 16 is pivotally supported upon uprights 17, made integral with or rigidly secured upon the supporting-base. The pivots, which may conveniently be adjustable conepoints, are designated by the reference charactor 18. The primary lever has a long arm 22, one end of which is adapted to control the movements of a valve or valves, to be hereinafter more fully described, and a short arm or extension 15, between which and the base is arranged a compression or return spring 19.

From the foregoing it will be seen that under the infi uence of a decrease in temperature the metallic strip 2 will contract and being rigidly secured to the base at 20 will pull upon the stud 21 and rotate the lever 16 upon its pivots 18. This Will-raise the end of the arm 22 of the lever 16 anddepress the arm or extension 15 against the pressure of the spring 19. A rise of temperature and a consequent expansion of the strip 2 will permit thespring to react and force the lever back and lower A regulating-screw 23 is supported in a screw-threaded bracket 24, which is rigid with the base 1. The end of the screw is arranged to bear against the strip 2, as shown in Fig. 2, and when it is desired that the thermostat shall act more quickly or at a lower temperature the said screw is adjusted to bear harder against the said thermostatic strip, with the resultthat the same is forced out of a straight line, and hence relatively shortened. A pointer or indicator 25 may be secured to the said adjusting-screw and a dial 26 provided, having the degrees of temperature marked thereon corresponding in position to the position the pointer will assume when the regulating-screw has adjusted the thermostat to operate at such degrees.

An air-chamber 3 is provided in the base 1, which air-chamber is in open communication with a reservoir 4, forming a source of compressed-air supply. The said communication is through an air-duct 5. A valve 6 controls egress from the said air-chamber 3 to a secondary air-chamber 28, as hereinafter set forth. The primary lever carries an exhaust-valve 7, the said exhaust-valve 7 and inlet-valve 6 being arranged through connecting-pin 8 to act synchronously in both directions. The valve 7 is here shown as mounted in a shouldered orifice in the arm 22 of the lever 16 and retained therein by a strip 40.

The secondary air-chamber 28, before referred to, is provided in the base 1, and a diaphragm 29 is in combination with such chamber. A lever 31, hereinafter referred to as the secondary lever, is provided and is pivoted at 39 to lugs 38 upon the base 1. One end of said lever bears against the follower 30 in engagement with the diaphragm 29, and

the other end controls valves 33 and 34, corresponding with valves 6 and 7. A spring 37 normally tends to lift the lever 31 and to raise the valve 34 from its seat. A pin 32 is arranged between the valves 33 and 34, and a spring 36 tends normally to close the valve 33, and hence acts in opposition to the spring 37.

.In Fig. 2 I have shown one end ofa steamradiator as a portion of a heating system and a heat-controller in the form of asteam-valve 14. Actuating means for the steam-valve is shown in a diaphragm-chamber 6, a diaphragm 11, a follower 12, secured to the stem of the steam-valve 14, anda return-spring 13. Compressed air introduced into the diaphragm-chamber 6 will depress the diaphragm 11 and close the valve 14. An exhaustion of the air in said chamber will permit the spring 13 to act, and the valve 14 will be opened. An

air-duct 10 is arranged between the air-chamber 3 in the base 1 and the diaphragm-chamber 6.

The device will operate then as follows: A rise in temperature of the medium surrounding the thermostatic strip 2 will cause same to expand relatively to the base,and the spring 19 will rock the lever 16 until the exhaustvalve 7 is closed and the inlet-valve 6 is opened. This will permit air under pressure to pass along the duct 27 to the secondary chamber 28. Air under pressure in the chamber 28 will raise the diaphragm 29, which will.

rock the lever 31, closing the exhaust-valve 34 and opening the inlet-valve 33. Air under pressure will then be admitted through the duct 10 from the chamber 3 to the chamber 6 of the heat-controller, and the steam-valve 14 will thereby be closed. A reduction of temperature surrounding the thermostatic strip 2 will have the contraryeffect of causing the exhaust-valve 7 to open and the inlet-valve 6 to close, whereby air will be exhausted from the secondary chamber 28, and hence will cause the exhaust-valve 34 to open and the inlet-valve 33 to close, whereby air will be exhausted from the chamber 6 of the heatcontroller. The duct controlled by the valves 33 and 34 may be larger than that controlled by the valves 6 and '7, and in such case a larger quantity of motive fluid will be allowed to pass along the duct 10 in a given time than would be permitted were the fluid delivered directly from the duct 27. By this means the heat-controller may be operated quickly, which, if the same be a steam-valve, is very advantageous.

By means of the construction herein set forth I am enabled to employ a thermostatic device which is exceedingly sensitive and yet quickly and positively operate a heatcontroller requiring considerable power in its operation.

' I do not desire of course to be limited only to the precise construction and combination of parts as herein set forth, as the same is obviously but one embodiment of my invention.

What I claim is 1. In a temperature-regulator, the combination with the base having a primary and a secondary chamber therein, a duct leading from said primary chamber to said secondary chamber and therefrom to exhaust, and another duct leading from said primary chamber and adapted to connect with the actuat ing means of a heat-controller, and therefrom to exhaust, the said primary chamber in open communication with a source of fiuid-pres= sure supply, of a primary and a secondary lever supported upon said base, a thermostatic device for controlling the movements of the primary lever, a diaphragm in communication with said secondary chamber, for controlling the movements of said secondary lever, two spring-actuated inlet-valves within said primary chamber, one for each duct leading therefrom, an exhaust-valve carried by each of the said levers, and stems between the said inlet and exhaust valves, whereby the valves for said first-mentioned duct are controlled by the movements of the primary lever, and the valves for the second-mentioned duct are controlled by the movements of the secondary lever, substantially as set forth.

2. In a temperature-regulator, the combination with a base having a primary and a secondary chamber therein, two ducts leading from within the said chamber to exhaust, one of the said ducts being ,of larger size ments of said secondary lever, and inlet and exhaust valves arranged at opposite ends of r 5 both of the two first-mentioned ducts, the

valves for the smaller duct controlled by the primary lever, and the valves for the larger duct controlled by the secondary lever.

Signed by me at New York, N, Y.,this 21st 20 day of February, 1900. v

ALFRED ROESCH.

Witnesses:

JNO. S. PARKER, O. FRED. CARRINGTON. 

